How FlyFast Works
FlyFast combines natural language understanding, real-time flight data from Google Flights, and conflict zone intelligence to find the best route for your trip. This page explains exactly how.
1. You describe your trip
Type what you need in plain English. FlyFast understands origins, destinations, dates, budgets, cabin class, stop preferences, and more.
"Mumbai to Hamburg next week, under $300"
"Cheapest flight from JFK to anywhere in Southeast Asia in July"
"Berlin to Tokyo, round trip, business class, flexible dates"
"London to New York nonstop this weekend"
FlyFast also expands nearby airports automatically. Searching "Hamburg" checks HAM, BRE, HAJ, LBC, and BER. Flexible dates like "cheapest in July" sample every few days across the month.
2. We parse your query with AI
Your natural language input is parsed into structured search parameters: origin airports, destination airports, date ranges, price limits, cabin class, and stop preferences. This parsing is powered by Google Gemini.
If your query is too broad (for example, "cheapest flight anywhere"), FlyFast suggests three narrower alternatives instead of running thousands of searches.
3. We search every matching flight
FlyFast searches every origin-destination-date combination in parallel across Google Flights. For a query like "Hamburg or Berlin to Tokyo, any day next week", that could be 5 origins x 2 destinations x 7 dates = 70 searches, all running simultaneously.
Results stream in as they arrive, so you see flights appearing in real time rather than waiting for all searches to finish.
4. We check every route against conflict zones
Every flight result is checked against our conflict zone dataset. We look at all airports in the itinerary and the airspace the route passes through. Routes are classified into four safety levels:
High-risk and do-not-fly routes are filtered out before you see them. You only see safe and caution-level flights.
5. We rank and recommend
After filtering, every remaining flight is scored across four dimensions:
- Price: lower is better
- Duration: shorter is better
- Stops: fewer is better
- Safety: safe routes score higher than caution routes
FlyFast then labels the top results:
- Recommended: best overall balance of price, speed, comfort, and safety
- Cheapest: lowest price among safe routes
- Fastest: shortest total travel time
- Lowest stress: fewest stops and simplest itinerary
6. You book directly
FlyFast does not sell tickets and does not take payment. When you click a flight, you go directly to the airline or to Google Flights where you can compare and book. Prices can change between our search and your booking.
Data sources
- Flight data: Google Flights, covering major carriers, low-cost airlines, and multi-airline itineraries worldwide.
- Conflict zone data: Maintained by Building Open. Includes active conflict zones, military activity areas, restricted airspace, and aviation advisories. Updated regularly. The "Conflict zones updated" date in the footer shows when the data was last refreshed.
- Query parsing: Google Gemini (AI) for natural language understanding.
FlyFast vs. traditional flight search
| FlyFast | Traditional search | |
|---|---|---|
| Input | Plain English sentence | Fill origin, destination, date, passengers forms |
| Conflict zone safety | Filtered by default | Not available |
| Multi-city search | "Hamburg or Berlin to Tokyo" | Search each combination manually |
| Flexible dates | "Cheapest day in July" | Check each day or use calendar view |
| Login required | No | Often |
| Price | Free | Free (with ads) |
Limitations
- FlyFast is decision support, not official travel advice. Always check government advisories and your airline before booking.
- Prices change in real time. The price you see may differ from the price at booking.
- Conflict zone data is updated regularly but may not reflect changes that happened in the last few days.
- FlyFast searches are rate-limited to 10 per hour per user to prevent abuse.